Performance Tests; Testing The Display; Backlight Test; Current Terminal Sensing Test - Fluke 87 IV Series Service Manual

Performance Tests

The following performance tests will ensure that the Meter is in proper operating
condition and will check the accuracy of each meter function against its specifications.
To perform the tests you will need a Fluke 5520A Calibrator or equipment meeting the
minimum specification given in Table 1.
If the Meter fails any of these tests, it needs calibration adjustment or repair.

Testing the Display

Q
Push down the
with the example in Figure 4. Check all segments for clarity and contrast.

Backlight Test

To test the backlight, press the
different intensity levels.

Current Terminal Sensing Test

This test determines whether or not the Input Alert™ beeper is functioning properly.
Before conducting this test, make sure the beeper is not disabled in setup.
1. Turn the rotary switch to the AC V function. Press the backlight button twice to turn
the backlight to the highest intensity.
2. Turn the rotary switch to all functions, except current functions. Note that the beeper
does not come on.
3. Turn the rotary switch to the DC mA position. Insert a test lead into the mA terminal.
Note that the beeper does not emit a continuous chirp.
As the test lead is inserted, the Meter may produce a single chirp. This is
acceptable.
button and simultaneously turn the Meter on. Compare the display
Figure 4. Display Test
T
button twice. Note that the backlight comes on at two
Note
Note
Performance Tests
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